of the Cottbus–Görlitz section at an estimated cost of €237.9 million. In 2008, the Lübbenau–Cottbus subsection was rebuilt to allow operations at 160 km/h. A computer-based interlocking was installed in Vetschau, which is connected to the Lübbenau electronic control centre. This was followed at the end of November 2010 by another electronic interlocking in Cottbus, the cost of which amounted to approximately €50 million. It replaced 13 old interlockings and is remotely-controlled by the operations centre in Berlin-Pankow. Work followed on the 60 km-long Königs Wusterhausen–Lübbenau section, starting in May 2010 and originally planned to end in April 2011. The track and overhead line systems were completely renewed as part of a full closure. New electronic interlockings were installed in Königs Wusterhausen and Lübbenau. Several bogs made the work more difficult. The restart of the line was then delayed by, among other things, repeated cable theft until September 2011. The line speed on the line between Königs Wusterhausen and Cottbus was raised to 160 km/h at the timetable change on 11 December 2011. The upgrade was brought forward by the use of Federal economic stimulus funds. Overall, these measures cost €130 million. In March 2016, the state of Brandenburg and Deutsche Bahn agreed to double-track the Lübbenau–Cottbus line at a cost of €2.4 million. Plans would be completed in 2017 and construction would be completed in 2023. It is uncertain when the section between Cottbus and Görlitz will be electrified. Costs of up to €100 million are forecast. South of Weißwasser the track has to be moved to the east of B 115 to allow expansion of the Reichwalde open pit lignite mine. The plans are already being developed. Fundamental renewal in the Berlin area The groundbreaking ceremony for the fundamental renewal of the line between the Berlin Ringbahn and Königs Wusterhausen, including the branch to Berlin-Schönefeld Airport, as part of the Grunderneuerung S-Bahn Berlin, S9 Süd ("fundamental renewal of the Berlin S-Bahn, S9 South") project was held on 12 July 2006. In addition to the S-Bahn facilities, this work includes work on the long-distance rail tracks that run parallel on this section. It includes the complete reconstruction of the S-Bahn stations of Adlershof and Baumschulenweg in new locations, the renewal of Schöneweide station, as well as the renovation of seven railway overpasses, including the erection of a new tied-arch bridge over the Britz Canal and the Teltow Canal to